Finally we get that Not yet album that was expected due to Yuko's grad.
Four types seems a bit overkill, expensive if you want them all! A and B are 3600 each, C 2600 and D 2100. What's interesting about Type D is that is is a "Play Button", which is basically an mp3 player pre-loaded with the album.
There's only two new songs, one each on type's A and B.
They are going to hold a live at Tokyo Ariake Coliseum on May 10th. This could be the final Yuko event!